Histological sections stained with H&E: (a) shows the entire root and indicates the position of the mesial (b) and distal (c) root-bone complex at higher magnifications; rough pitted bone surface on the surface of the distal complex and the regular surface in the mesial complex; note: resorption pits in bone (black arrows), cement lines in bone (grey arrows), root resorption (white arrows), and blood vessel spaces (white stars). De = dentin, RB = interradicular bone, DB = interdental bone, SC = secondary cementum, and PC = primary cementum.
